/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:29:37,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 00:29:37,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 00:29:37,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 00:29:37,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:29:37,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:29:37,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:29:37,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:29:37,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:29:37,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:29:37,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:29:37,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:29:37,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:29:37,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:29:37,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:29:37,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:29:37,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:29:37,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:29:37,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:29:37,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:29:37,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:29:37,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:29:37,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:29:37,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:29:37,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 00:29:37,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 00:29:37,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 00:29:37,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 00:29:37,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 00:29:37,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 00:29:37,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 00:29:37,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 00:29:37,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 00:29:37,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 00:29:37,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 00:29:37,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 00:29:37,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 00:29:37,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 00:29:37,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:29:37,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:29:37,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:29:37,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 00:29:37,242 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:29:37,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:29:37,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:29:37,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:29:37,245 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:29:37,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:29:37,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:29:37,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:29:37,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:29:37,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:29:37,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:29:37,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:29:37,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:29:37,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:29:37,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:29:37,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:29:37,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:29:37,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:29:37,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:29:37,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:29:37,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:29:37,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:29:37,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:29:37,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:29:37,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:29:37,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:29:37,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:29:37,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:29:37,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:29:37,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:29:37,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:29:37,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:29:37,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:29:37,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:29:37,601 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:29:37,602 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2020-08-19 00:29:37,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6132f201/f62cbdf92c304cea82451b7505751902/FLAG225dbea13 [2020-08-19 00:29:38,154 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:29:38,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2020-08-19 00:29:38,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6132f201/f62cbdf92c304cea82451b7505751902/FLAG225dbea13 [2020-08-19 00:29:38,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6132f201/f62cbdf92c304cea82451b7505751902 [2020-08-19 00:29:38,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:29:38,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:29:38,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:29:38,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:29:38,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:29:38,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:38,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218d3b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38, skipping insertion in model container [2020-08-19 00:29:38,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:38,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:29:38,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:29:38,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:29:38,813 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:29:38,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:29:38,962 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:29:38,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38 WrapperNode [2020-08-19 00:29:38,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:29:38,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:29:38,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:29:38,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:29:38,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:38,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:38,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:38,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:38,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:39,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:39,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... [2020-08-19 00:29:39,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:29:39,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:29:39,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:29:39,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:29:39,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:29:39,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:29:39,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:29:39,090 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-19 00:29:39,090 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-19 00:29:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-19 00:29:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-19 00:29:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-19 00:29:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-19 00:29:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-19 00:29:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-19 00:29:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-19 00:29:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-19 00:29:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-19 00:29:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-19 00:29:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-19 00:29:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-19 00:29:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-19 00:29:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-19 00:29:39,094 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-19 00:29:39,094 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-19 00:29:39,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:29:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:29:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-19 00:29:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-19 00:29:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-19 00:29:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-19 00:29:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 00:29:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-19 00:29:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-19 00:29:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-19 00:29:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-19 00:29:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-19 00:29:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-19 00:29:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-19 00:29:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-19 00:29:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-19 00:29:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-19 00:29:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-19 00:29:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-19 00:29:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-19 00:29:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-19 00:29:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:29:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:29:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:29:39,580 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:29:39,580 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 00:29:39,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:29:39 BoogieIcfgContainer [2020-08-19 00:29:39,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:29:39,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:29:39,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:29:39,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:29:39,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:29:38" (1/3) ... [2020-08-19 00:29:39,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48216df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:29:39, skipping insertion in model container [2020-08-19 00:29:39,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:29:38" (2/3) ... [2020-08-19 00:29:39,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48216df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:29:39, skipping insertion in model container [2020-08-19 00:29:39,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:29:39" (3/3) ... [2020-08-19 00:29:39,595 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-2.c [2020-08-19 00:29:39,605 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:29:39,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:29:39,628 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:29:39,654 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:29:39,654 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:29:39,655 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:29:39,655 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:29:39,655 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:29:39,655 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:29:39,655 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:29:39,656 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:29:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states. [2020-08-19 00:29:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:29:39,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:39,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:39,693 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash -540085109, now seen corresponding path program 1 times [2020-08-19 00:29:39,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:39,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720913966] [2020-08-19 00:29:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:29:40,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720913966] [2020-08-19 00:29:40,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:40,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 00:29:40,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432251051] [2020-08-19 00:29:40,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:29:40,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:40,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:29:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:29:40,452 INFO L87 Difference]: Start difference. First operand 151 states. Second operand 9 states. [2020-08-19 00:29:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:42,540 INFO L93 Difference]: Finished difference Result 522 states and 794 transitions. [2020-08-19 00:29:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:29:42,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-19 00:29:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:42,561 INFO L225 Difference]: With dead ends: 522 [2020-08-19 00:29:42,561 INFO L226 Difference]: Without dead ends: 371 [2020-08-19 00:29:42,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:29:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-19 00:29:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 257. [2020-08-19 00:29:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-19 00:29:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 346 transitions. [2020-08-19 00:29:42,678 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 346 transitions. Word has length 78 [2020-08-19 00:29:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:42,680 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 346 transitions. [2020-08-19 00:29:42,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:29:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 346 transitions. [2020-08-19 00:29:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:29:42,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:42,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:42,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:29:42,696 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:42,697 INFO L82 PathProgramCache]: Analyzing trace with hash 211359051, now seen corresponding path program 1 times [2020-08-19 00:29:42,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:42,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650476032] [2020-08-19 00:29:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:29:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650476032] [2020-08-19 00:29:42,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:42,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 00:29:42,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011126318] [2020-08-19 00:29:42,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:29:42,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:42,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:29:42,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:29:42,942 INFO L87 Difference]: Start difference. First operand 257 states and 346 transitions. Second operand 10 states. [2020-08-19 00:29:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:44,082 INFO L93 Difference]: Finished difference Result 599 states and 848 transitions. [2020-08-19 00:29:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:29:44,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-19 00:29:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:44,094 INFO L225 Difference]: With dead ends: 599 [2020-08-19 00:29:44,095 INFO L226 Difference]: Without dead ends: 361 [2020-08-19 00:29:44,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-08-19 00:29:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-08-19 00:29:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 257. [2020-08-19 00:29:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-19 00:29:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 339 transitions. [2020-08-19 00:29:44,180 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 339 transitions. Word has length 78 [2020-08-19 00:29:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:44,181 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 339 transitions. [2020-08-19 00:29:44,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:29:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 339 transitions. [2020-08-19 00:29:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:29:44,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:44,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:44,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:29:44,185 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2119705461, now seen corresponding path program 1 times [2020-08-19 00:29:44,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:44,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930572831] [2020-08-19 00:29:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:29:44,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930572831] [2020-08-19 00:29:44,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:44,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 00:29:44,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979434458] [2020-08-19 00:29:44,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:29:44,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:29:44,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:29:44,365 INFO L87 Difference]: Start difference. First operand 257 states and 339 transitions. Second operand 10 states. [2020-08-19 00:29:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:45,870 INFO L93 Difference]: Finished difference Result 722 states and 1058 transitions. [2020-08-19 00:29:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:29:45,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-19 00:29:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:45,876 INFO L225 Difference]: With dead ends: 722 [2020-08-19 00:29:45,877 INFO L226 Difference]: Without dead ends: 484 [2020-08-19 00:29:45,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:29:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-08-19 00:29:45,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 309. [2020-08-19 00:29:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-08-19 00:29:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 392 transitions. [2020-08-19 00:29:45,924 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 392 transitions. Word has length 78 [2020-08-19 00:29:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:45,925 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 392 transitions. [2020-08-19 00:29:45,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:29:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 392 transitions. [2020-08-19 00:29:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:29:45,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:45,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:45,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:29:45,928 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:45,928 INFO L82 PathProgramCache]: Analyzing trace with hash -579817174, now seen corresponding path program 1 times [2020-08-19 00:29:45,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:45,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033220178] [2020-08-19 00:29:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:45,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:45,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:45,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:29:46,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033220178] [2020-08-19 00:29:46,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:46,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 00:29:46,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055824662] [2020-08-19 00:29:46,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:29:46,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:29:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:29:46,100 INFO L87 Difference]: Start difference. First operand 309 states and 392 transitions. Second operand 10 states. [2020-08-19 00:29:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:47,454 INFO L93 Difference]: Finished difference Result 744 states and 1001 transitions. [2020-08-19 00:29:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 00:29:47,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-19 00:29:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:47,461 INFO L225 Difference]: With dead ends: 744 [2020-08-19 00:29:47,462 INFO L226 Difference]: Without dead ends: 455 [2020-08-19 00:29:47,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:29:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-08-19 00:29:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 329. [2020-08-19 00:29:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-08-19 00:29:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 412 transitions. [2020-08-19 00:29:47,526 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 412 transitions. Word has length 78 [2020-08-19 00:29:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:47,529 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 412 transitions. [2020-08-19 00:29:47,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:29:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 412 transitions. [2020-08-19 00:29:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:29:47,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:47,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:47,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:29:47,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:47,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash -156170452, now seen corresponding path program 1 times [2020-08-19 00:29:47,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:47,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062800017] [2020-08-19 00:29:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:29:47,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062800017] [2020-08-19 00:29:47,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:47,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 00:29:47,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842153670] [2020-08-19 00:29:47,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:29:47,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:47,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:29:47,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:29:47,772 INFO L87 Difference]: Start difference. First operand 329 states and 412 transitions. Second operand 10 states. [2020-08-19 00:29:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:49,088 INFO L93 Difference]: Finished difference Result 774 states and 1027 transitions. [2020-08-19 00:29:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 00:29:49,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-19 00:29:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:49,094 INFO L225 Difference]: With dead ends: 774 [2020-08-19 00:29:49,094 INFO L226 Difference]: Without dead ends: 465 [2020-08-19 00:29:49,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:29:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-08-19 00:29:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 339. [2020-08-19 00:29:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-08-19 00:29:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 420 transitions. [2020-08-19 00:29:49,133 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 420 transitions. Word has length 78 [2020-08-19 00:29:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:49,133 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 420 transitions. [2020-08-19 00:29:49,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:29:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 420 transitions. [2020-08-19 00:29:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:29:49,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:49,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:49,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:29:49,136 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash 118589162, now seen corresponding path program 1 times [2020-08-19 00:29:49,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:49,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928866404] [2020-08-19 00:29:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:29:49,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928866404] [2020-08-19 00:29:49,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:49,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 00:29:49,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011698098] [2020-08-19 00:29:49,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:29:49,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:29:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:29:49,326 INFO L87 Difference]: Start difference. First operand 339 states and 420 transitions. Second operand 10 states. [2020-08-19 00:29:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:50,833 INFO L93 Difference]: Finished difference Result 920 states and 1216 transitions. [2020-08-19 00:29:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 00:29:50,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-19 00:29:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:50,840 INFO L225 Difference]: With dead ends: 920 [2020-08-19 00:29:50,841 INFO L226 Difference]: Without dead ends: 600 [2020-08-19 00:29:50,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:29:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-08-19 00:29:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 375. [2020-08-19 00:29:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-08-19 00:29:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 445 transitions. [2020-08-19 00:29:50,902 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 445 transitions. Word has length 78 [2020-08-19 00:29:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:50,906 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 445 transitions. [2020-08-19 00:29:50,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:29:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 445 transitions. [2020-08-19 00:29:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:29:50,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:50,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:50,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:29:50,909 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash 180628776, now seen corresponding path program 1 times [2020-08-19 00:29:50,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:50,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019621660] [2020-08-19 00:29:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:29:51,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019621660] [2020-08-19 00:29:51,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:51,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 00:29:51,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811980111] [2020-08-19 00:29:51,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:29:51,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:29:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:29:51,124 INFO L87 Difference]: Start difference. First operand 375 states and 445 transitions. Second operand 7 states. [2020-08-19 00:29:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:52,346 INFO L93 Difference]: Finished difference Result 1208 states and 1535 transitions. [2020-08-19 00:29:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 00:29:52,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-08-19 00:29:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:52,357 INFO L225 Difference]: With dead ends: 1208 [2020-08-19 00:29:52,357 INFO L226 Difference]: Without dead ends: 853 [2020-08-19 00:29:52,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-19 00:29:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-08-19 00:29:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 751. [2020-08-19 00:29:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 751 states. [2020-08-19 00:29:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 921 transitions. [2020-08-19 00:29:52,455 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 921 transitions. Word has length 78 [2020-08-19 00:29:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:52,456 INFO L479 AbstractCegarLoop]: Abstraction has 751 states and 921 transitions. [2020-08-19 00:29:52,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:29:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 921 transitions. [2020-08-19 00:29:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-19 00:29:52,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:52,459 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:52,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:29:52,460 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash 972462964, now seen corresponding path program 1 times [2020-08-19 00:29:52,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:52,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582112522] [2020-08-19 00:29:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 00:29:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 00:29:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-19 00:29:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:29:52,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582112522] [2020-08-19 00:29:52,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:29:52,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:29:52,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425756204] [2020-08-19 00:29:52,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:29:52,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:29:52,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:29:52,699 INFO L87 Difference]: Start difference. First operand 751 states and 921 transitions. Second operand 9 states. [2020-08-19 00:29:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:54,483 INFO L93 Difference]: Finished difference Result 2122 states and 2794 transitions. [2020-08-19 00:29:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:29:54,484 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-08-19 00:29:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:54,493 INFO L225 Difference]: With dead ends: 2122 [2020-08-19 00:29:54,494 INFO L226 Difference]: Without dead ends: 1391 [2020-08-19 00:29:54,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:29:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2020-08-19 00:29:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1307. [2020-08-19 00:29:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2020-08-19 00:29:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1584 transitions. [2020-08-19 00:29:54,610 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1584 transitions. Word has length 123 [2020-08-19 00:29:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:54,611 INFO L479 AbstractCegarLoop]: Abstraction has 1307 states and 1584 transitions. [2020-08-19 00:29:54,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:29:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1584 transitions. [2020-08-19 00:29:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-19 00:29:54,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:54,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:54,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:29:54,615 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:54,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1319133239, now seen corresponding path program 1 times [2020-08-19 00:29:54,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:54,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281725323] [2020-08-19 00:29:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 00:29:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 00:29:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-19 00:29:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-19 00:29:54,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281725323] [2020-08-19 00:29:54,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:29:54,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 00:29:54,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284452564] [2020-08-19 00:29:54,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:29:54,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:29:54,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:29:54,799 INFO L87 Difference]: Start difference. First operand 1307 states and 1584 transitions. Second operand 9 states. [2020-08-19 00:29:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:56,855 INFO L93 Difference]: Finished difference Result 3361 states and 4209 transitions. [2020-08-19 00:29:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 00:29:56,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-08-19 00:29:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:56,866 INFO L225 Difference]: With dead ends: 3361 [2020-08-19 00:29:56,866 INFO L226 Difference]: Without dead ends: 1577 [2020-08-19 00:29:56,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:29:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-08-19 00:29:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1511. [2020-08-19 00:29:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1511 states. [2020-08-19 00:29:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1789 transitions. [2020-08-19 00:29:57,002 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1789 transitions. Word has length 123 [2020-08-19 00:29:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:57,002 INFO L479 AbstractCegarLoop]: Abstraction has 1511 states and 1789 transitions. [2020-08-19 00:29:57,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:29:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1789 transitions. [2020-08-19 00:29:57,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-19 00:29:57,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:57,008 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:57,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:29:57,008 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:57,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1505336733, now seen corresponding path program 1 times [2020-08-19 00:29:57,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:57,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588583024] [2020-08-19 00:29:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 00:29:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 00:29:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 00:29:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 00:29:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-19 00:29:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:29:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-19 00:29:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-08-19 00:29:57,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588583024] [2020-08-19 00:29:57,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:29:57,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:29:57,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266805817] [2020-08-19 00:29:57,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:29:57,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:29:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:29:57,247 INFO L87 Difference]: Start difference. First operand 1511 states and 1789 transitions. Second operand 9 states. [2020-08-19 00:29:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:29:58,620 INFO L93 Difference]: Finished difference Result 3075 states and 3746 transitions. [2020-08-19 00:29:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:29:58,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2020-08-19 00:29:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:29:58,635 INFO L225 Difference]: With dead ends: 3075 [2020-08-19 00:29:58,636 INFO L226 Difference]: Without dead ends: 1585 [2020-08-19 00:29:58,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:29:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-08-19 00:29:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1505. [2020-08-19 00:29:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-08-19 00:29:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1755 transitions. [2020-08-19 00:29:58,760 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1755 transitions. Word has length 177 [2020-08-19 00:29:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:29:58,761 INFO L479 AbstractCegarLoop]: Abstraction has 1505 states and 1755 transitions. [2020-08-19 00:29:58,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:29:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1755 transitions. [2020-08-19 00:29:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-19 00:29:58,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:29:58,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:29:58,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:29:58,767 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:29:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:29:58,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1006491229, now seen corresponding path program 1 times [2020-08-19 00:29:58,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:29:58,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912241436] [2020-08-19 00:29:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:29:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:29:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:29:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:29:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:29:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:29:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:29:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:29:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 00:29:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 00:29:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-19 00:29:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-19 00:29:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 00:29:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:29:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:58,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:29:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:29:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:59,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:29:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:59,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 00:29:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:29:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-19 00:29:59,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912241436] [2020-08-19 00:29:59,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:29:59,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:29:59,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426173907] [2020-08-19 00:29:59,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:29:59,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:29:59,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:29:59,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:29:59,076 INFO L87 Difference]: Start difference. First operand 1505 states and 1755 transitions. Second operand 10 states. [2020-08-19 00:30:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:30:00,905 INFO L93 Difference]: Finished difference Result 3514 states and 4187 transitions. [2020-08-19 00:30:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 00:30:00,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 178 [2020-08-19 00:30:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:30:00,912 INFO L225 Difference]: With dead ends: 3514 [2020-08-19 00:30:00,912 INFO L226 Difference]: Without dead ends: 1021 [2020-08-19 00:30:00,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-08-19 00:30:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-08-19 00:30:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 985. [2020-08-19 00:30:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-08-19 00:30:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1123 transitions. [2020-08-19 00:30:00,994 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1123 transitions. Word has length 178 [2020-08-19 00:30:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:30:00,995 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1123 transitions. [2020-08-19 00:30:00,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:30:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1123 transitions. [2020-08-19 00:30:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-19 00:30:00,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:30:00,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:30:00,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:30:00,999 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:30:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:30:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2053123678, now seen corresponding path program 1 times [2020-08-19 00:30:00,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:30:01,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763122086] [2020-08-19 00:30:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:30:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:30:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:30:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:30:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:30:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:30:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:30:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:30:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:30:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:30:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:30:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 00:30:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 00:30:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 00:30:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 00:30:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:30:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:30:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:30:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 00:30:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:30:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:30:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:30:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:30:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 00:30:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-08-19 00:30:01,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763122086] [2020-08-19 00:30:01,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:30:01,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:30:01,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420350343] [2020-08-19 00:30:01,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:30:01,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:30:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:30:01,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:30:01,415 INFO L87 Difference]: Start difference. First operand 985 states and 1123 transitions. Second operand 12 states. [2020-08-19 00:30:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:30:03,693 INFO L93 Difference]: Finished difference Result 1223 states and 1418 transitions. [2020-08-19 00:30:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 00:30:03,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 178 [2020-08-19 00:30:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:30:03,702 INFO L225 Difference]: With dead ends: 1223 [2020-08-19 00:30:03,702 INFO L226 Difference]: Without dead ends: 1220 [2020-08-19 00:30:03,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-08-19 00:30:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-19 00:30:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1172. [2020-08-19 00:30:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-08-19 00:30:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1335 transitions. [2020-08-19 00:30:03,799 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1335 transitions. Word has length 178 [2020-08-19 00:30:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:30:03,800 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1335 transitions. [2020-08-19 00:30:03,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:30:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1335 transitions. [2020-08-19 00:30:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-08-19 00:30:03,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:30:03,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:30:03,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:30:03,804 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:30:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:30:03,804 INFO L82 PathProgramCache]: Analyzing trace with hash 5197958, now seen corresponding path program 1 times [2020-08-19 00:30:03,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:30:03,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300988058] [2020-08-19 00:30:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:30:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:30:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:30:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:30:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 00:30:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 00:30:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:30:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:30:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:30:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:30:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:30:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 00:30:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 00:30:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 00:30:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 00:30:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:30:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:30:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:03,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:30:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:04,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-19 00:30:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:04,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:30:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:30:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:04,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 00:30:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:04,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:30:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-19 00:30:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:30:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-08-19 00:30:04,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300988058] [2020-08-19 00:30:04,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:30:04,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:30:04,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107814955] [2020-08-19 00:30:04,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:30:04,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:30:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:30:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:30:04,061 INFO L87 Difference]: Start difference. First operand 1172 states and 1335 transitions. Second operand 9 states. [2020-08-19 00:30:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:30:05,333 INFO L93 Difference]: Finished difference Result 2003 states and 2338 transitions. [2020-08-19 00:30:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:30:05,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 182 [2020-08-19 00:30:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:30:05,345 INFO L225 Difference]: With dead ends: 2003 [2020-08-19 00:30:05,345 INFO L226 Difference]: Without dead ends: 1220 [2020-08-19 00:30:05,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:30:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-19 00:30:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1186. [2020-08-19 00:30:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1186 states. [2020-08-19 00:30:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1353 transitions. [2020-08-19 00:30:05,543 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1353 transitions. Word has length 182 [2020-08-19 00:30:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:30:05,544 INFO L479 AbstractCegarLoop]: Abstraction has 1186 states and 1353 transitions. [2020-08-19 00:30:05,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:30:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1353 transitions. [2020-08-19 00:30:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-08-19 00:30:05,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:30:05,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:30:05,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:30:05,551 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:30:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:30:05,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1390323253, now seen corresponding path program 1 times [2020-08-19 00:30:05,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:30:05,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239629705] [2020-08-19 00:30:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:30:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 00:30:05,610 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 00:30:05,610 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 00:30:05,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:30:05,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 12:30:05 BoogieIcfgContainer [2020-08-19 00:30:05,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 00:30:05,684 INFO L168 Benchmark]: Toolchain (without parser) took 27155.51 ms. Allocated memory was 138.4 MB in the beginning and 548.4 MB in the end (delta: 410.0 MB). Free memory was 101.6 MB in the beginning and 453.6 MB in the end (delta: -352.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2020-08-19 00:30:05,686 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 00:30:05,687 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.99 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 180.5 MB in the end (delta: -79.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-19 00:30:05,688 INFO L168 Benchmark]: Boogie Preprocessor took 56.59 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-19 00:30:05,693 INFO L168 Benchmark]: RCFGBuilder took 565.84 ms. Allocated memory is still 201.9 MB. Free memory was 177.9 MB in the beginning and 144.6 MB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2020-08-19 00:30:05,700 INFO L168 Benchmark]: TraceAbstraction took 26092.73 ms. Allocated memory was 201.9 MB in the beginning and 548.4 MB in the end (delta: 346.6 MB). Free memory was 144.6 MB in the beginning and 453.6 MB in the end (delta: -309.0 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-08-19 00:30:05,709 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 434.99 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 180.5 MB in the end (delta: -79.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.59 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 565.84 ms. Allocated memory is still 201.9 MB. Free memory was 177.9 MB in the beginning and 144.6 MB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26092.73 ms. Allocated memory was 201.9 MB in the beginning and 548.4 MB in the end (delta: 346.6 MB). Free memory was 144.6 MB in the beginning and 453.6 MB in the end (delta: -309.0 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int m_pc = 0; [L15] int t1_pc = 0; [L16] int m_st ; [L17] int t1_st ; [L18] int m_i ; [L19] int t1_i ; [L20] int M_E = 2; [L21] int T1_E = 2; [L22] int E_M = 2; [L23] int E_1 = 2; [L27] int token ; [L29] int local ; [L475] int __retres1 ; [L479] CALL init_model() [L390] m_i = 1 [L391] t1_i = 1 [L479] RET init_model() [L480] CALL start_simulation() [L416] int kernel_st ; [L417] int tmp ; [L418] int tmp___0 ; [L422] kernel_st = 0 [L423] FCALL update_channels() [L424] CALL init_threads() [L172] COND TRUE m_i == 1 [L173] m_st = 0 [L177] COND TRUE t1_i == 1 [L178] t1_st = 0 [L424] RET init_threads() [L425] CALL fire_delta_events() [L261] COND FALSE !(M_E == 0) [L266] COND FALSE !(T1_E == 0) [L271] COND FALSE !(E_M == 0) [L276] COND FALSE !(E_1 == 0) [L425] RET fire_delta_events() [L426] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND FALSE !(m_pc == 1) [L136] __retres1 = 0 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND FALSE !(\read(tmp)) [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND FALSE !(t1_pc == 1) [L155] __retres1 = 0 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND FALSE !(\read(tmp___0)) [L426] RET activate_threads() [L427] CALL reset_delta_events() [L289] COND FALSE !(M_E == 1) [L294] COND FALSE !(T1_E == 1) [L299] COND FALSE !(E_M == 1) [L304] COND FALSE !(E_1 == 1) [L427] RET reset_delta_events() [L430] COND TRUE 1 [L433] kernel_st = 1 [L434] CALL eval() [L208] int tmp ; [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND FALSE !(\read(tmp_ndt_1)) [L236] COND TRUE t1_st == 0 [L237] int tmp_ndt_2; [L238] tmp_ndt_2 = __VERIFIER_nondet_int() [L239] COND TRUE \read(tmp_ndt_2) [L241] t1_st = 1 [L242] CALL transmit1() [L90] COND TRUE t1_pc == 0 [L101] COND TRUE 1 [L103] t1_pc = 1 [L104] t1_st = 2 [L242] RET transmit1() [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND TRUE \read(tmp_ndt_1) [L227] m_st = 1 [L228] CALL master() [L32] int tmp_var = __VERIFIER_nondet_int(); [L34] COND TRUE m_pc == 0 [L45] COND TRUE 1 [L48] token = __VERIFIER_nondet_int() [L49] local = token [L50] E_1 = 1 [L51] CALL immediate_notify() [L343] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND FALSE !(m_pc == 1) [L136] __retres1 = 0 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND FALSE !(\read(tmp)) [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND TRUE t1_pc == 1 [L146] COND TRUE E_1 == 1 [L147] __retres1 = 1 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND TRUE \read(tmp___0) [L330] t1_st = 0 [L343] RET activate_threads() [L51] RET immediate_notify() [L52] E_1 = 2 [L53] m_pc = 1 [L54] m_st = 2 [L228] RET master() [L236] COND TRUE t1_st == 0 [L237] int tmp_ndt_2; [L238] tmp_ndt_2 = __VERIFIER_nondet_int() [L239] COND TRUE \read(tmp_ndt_2) [L241] t1_st = 1 [L242] CALL transmit1() [L90] COND FALSE !(t1_pc == 0) [L93] COND TRUE t1_pc == 1 [L109] token += 1 [L110] E_M = 1 [L111] CALL immediate_notify() [L343] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND TRUE m_pc == 1 [L127] COND TRUE E_M == 1 [L128] __retres1 = 1 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND TRUE \read(tmp) [L322] m_st = 0 [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND TRUE t1_pc == 1 [L146] COND FALSE !(E_1 == 1) [L155] __retres1 = 0 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND FALSE !(\read(tmp___0)) [L343] RET activate_threads() [L111] RET immediate_notify() [L112] E_M = 2 [L101] COND TRUE 1 [L103] t1_pc = 1 [L104] t1_st = 2 [L242] RET transmit1() [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND TRUE \read(tmp_ndt_1) [L227] m_st = 1 [L228] CALL master() [L32] int tmp_var = __VERIFIER_nondet_int(); [L34] COND FALSE !(m_pc == 0) [L37] COND TRUE m_pc == 1 [L59] COND FALSE !(token != local + 1) [L64] COND TRUE tmp_var <= 5 [L65] COND TRUE tmp_var >= 5 [L70] COND TRUE tmp_var <= 5 [L71] COND TRUE tmp_var >= 5 [L72] COND TRUE tmp_var == 5 [L73] CALL error() [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 21 procedures, 151 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.9s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 20.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2070 SDtfs, 7650 SDslu, 593 SDs, 0 SdLazy, 12274 SolverSat, 4253 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 662 GetRequests, 436 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1511occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 1320 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 1690 NumberOfCodeBlocks, 1690 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1494 ConstructedInterpolants, 0 QuantifiedInterpolants, 452054 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 474/494 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...